Or would this be the (possibly first) iteration of that double intercrural sex/vagina rub you see at he end of every threesome doujin combined with a buttjob?
In the second case it's a new hentai technique! I wonder if it would deserve its own tag. Are there any instances of vagina run combined with paizuri or footjob? Oh the new possibilities!
There also needs to be more like this. Sex through clothing is by far one of the best acts out there and this one is so well done. Even if there is not a transition to Blanche but that would be too great!